• Chicago
  • Mongolian Autonomous County of Henan

Chicago (/ʃɪˈkɑːɡoʊ/ (listen) shih-KAH-goh, locally also /ʃɪˈkɔːɡoʊ/ shih-KAW-goh) is the most populous city in the U.S. state of Illinois and the third-most populous in the United States, after New York City and Los Angeles. With a population of 2,746,388 in the 2020 census, it is also the most populous city in the Midwest. As the seat of Cook County (the second-most populous U.S. county), the city is the center of the Chicago metropolitan area, one of the largest in the world.

On the shore of Lake Michigan, Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed. It grew rapidly in the mid-19th century; by 1860, Chicago was the youngest U.S. city to exceed a population of 100,000. The Great Chicago Fire in 1871 destroyed several square miles and left more than 100,000 homeless, but Chicago's population continued to grow to 503,000 by 1880 and then doubled to more than a million within the decade. The construction boom accelerated population growth throughout the following decades, and by 1900, less than 30 years after the fire, Chicago was the fifth-largest city in the world. Chicago made noted contributions to urban planning and zoning standards, including new construction styles (such as, Chicago School architecture, the development of the City Beautiful Movement, and the steel-framed skyscraper).

Chicago is an international hub for finance, culture, commerce, industry, education, technology, telecommunications, and transportation. It is the site of the creation of the first standardized futures contracts, issued by the Chicago Board of Trade, which today is part of the largest and most diverse derivatives market in the world, generating 20% of all volume in commodities and financial futures alone. O'Hare International Airport is routinely ranked among the world's top six busiest airports according to tracked data by the Airports Council International. The region also has the largest number of federal highways and is the nation's railroad hub. The Chicago area has one of the highest gross domestic products (GDP) in the world, generating $689 billion in 2018. The economy of Chicago is diverse, with no single industry employing more than 14% of the workforce. It is home to several Fortune 500 companies, including Archer Daniels Midland, Conagra Brands, Exelon, JLL, Kraft Heinz, McDonald's, Mondelez International, Motorola Solutions, Sears, and United Airlines Holdings.

Henan Mongolian Autonomous County is the only Mongolian Autonomous County in Qinghai Province, commonly known as "Henan Mengqi", which has the highest proportion of Mongolian population in China. It is located in the southeast of Qinghai Province, facing Xiahe County and Luqu County of Gannan Tibetan Autonomous Prefecture of Gansu Province to the east, Maqu County of Gannan Tibetan Autonomous Prefecture of Gansu Province to the south, Maqin County of Guoluo Tibetan Autonomous Prefecture of Qinghai Province and Tongde County of Hainan Prefecture in the southwest, adjacent to Zeku County in the north, located in the joint of three provinces of Qinghai and Gansu, known as the south gate of Qinghai Province. The county covers a total area of 6997.45 square kilometers and is 3600 meters above sea level. It has jurisdiction over one town, four townships, two communities, 39 animal husbandry committees, 135 animal husbandry cooperatives and four Tibetan Buddhist monasteries. As of 2011, the total population was 40, 000, of which 93.21% were Mongolians. Henan County is the largest organic animal husbandry student in China.
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